四川农业大学学报 ›› 1983, Vol. 1 ›› Issue (02): 231-242.doi: 10.16036/j.issn.1000-2650.1983.02.012

• 研究论文 • 上一篇    下一篇

雅安茶区茶树光合量测试报告

王宗尧, 陈昌辉, 吉林, 杨安   

  1. 四川农学院茶树栽培育种教研室
  • 出版日期:1983-06-30 发布日期:2017-03-11

MEASUREMENTS OF PHOTOSYNTHESIS OF TEA PLANTS GROWN IN YAAN

Wang Zongyao, Chen Changhui, Ji Lin, Yang An   

  1. Sichuan Agricultural College
  • Online:1983-06-30 Published:2017-03-11

摘要: 光合作用是一切生命活动的物质基础和能量的主要来源。一般作物的干物质中有90-95%来自光合产物。茶树是多年生常绿叶用植物,以摘采芽叶为主要生产目的。茶树芽叶既是采收对象,又是行光合作用的重要营养器官。因此,茶树叶片光合能力的大小,对于产量的形成关系极为密切。茶树属耐阴植物,光饱和点低,光能利用率也就低。据报导,一般光能利用率在1%左右,即使亩产千斤的高产茶园,光能利用率也未超过3%。如何从提高光能利用率,以挖掘增产潜力,便成为茶树栽培工作者十分关注的课题。
为了提高茶叶产量,国外茶叶工作者从四十年代起开展了茶树光合作用的研究。研究的范围主要是影响茶树光合作用的光照、温度、CO2浓度、土壤水分、肥料及叶片性质以及光合产物在茶树内如何进行分配等。研究方法有干重法、气流法、红外线CO2测定法和14C示踪法。
我国茶区辽阔,茶树品种繁多,一由于开展茶树光合作用研究的起步较晚(六十年代初),不论研究的范围或从事该项研究的地区均有跟。为了提高四川茶叶的产量和品质,对本区茶树的光合作用进行研究是很有必要的。不仅能掌握本序茶树光合作用的基本情况,并对指导本区茶叶生产有现实意义。

Abstract: In this experiment, measurements were made in an attempt to determine the photosynthetic rate and other changes of the main varieties of tea plants in Yaan、Sichuan Province. The results are as follows:
1) The daily photosynthetic rate of tea plants presents a bimodal distribution with the timecourse of the "peak" and the "valley" varying with the varieties and the seasons.
2) The seasonal changes of the photosynthetic rate are significantly different among the varieties, and the difference in various crop seasons is extremely. obvious For the same variety the photosynthetic rate is not obviously affected by the density of crop eitherin the "cultivated type" or in the "naturally growing type". There is an obvious differerce in different layers of leaves, the ratio of the upper to the middle layers of leaves in photosynthetic rate depending on the leaf area inde.
2) The annual changes of photosynthetic rate correspond to those of light intensity. The effects of the temperature on the photosynthetic intensity are obvious above 35℃ and below 20℃, and less so between 20℃ and 25℃. The relatire humidity and the water content of the fresh tea leaf do not directly affect the photosynthetic intensity except influencing the opening and closing of stomas. The stomatal opening degrees are positively coerrlative with photosynthetic rate in the daytime and are independent at night.